1 #include <linux/pci.h>
2 #include <linux/module.h>
3 #include "pci.h"
4
5 #undef DEBUG
6
7 #ifdef DEBUG
8 #define DBG(x...) printk(x)
9 #else
10 #define DBG(x...)
11 #endif
12
13 static void pci_free_resources(struct pci_dev *dev)
14 {
15 int i;
16
17 msi_remove_pci_irq_vectors(dev);
18
19 pci_cleanup_rom(dev);
20 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
21 struct resource *res = dev->resource + i;
22 if (res->parent)
23 release_resource(res);
24 }
25 }
26
27 static void pci_destroy_dev(struct pci_dev *dev)
28 {
29 pci_proc_detach_device(dev);
30 pci_remove_sysfs_dev_files(dev);
31 device_unregister(&dev->dev);
32
33 /* Remove the device from the device lists, and prevent any further
34 * list accesses from this device */
35 spin_lock(&pci_bus_lock);
36 list_del(&dev->bus_list);
37 list_del(&dev->global_list);
38 dev->bus_list.next = dev->bus_list.prev = NULL;
39 dev->global_list.next = dev->global_list.prev = NULL;
40 spin_unlock(&pci_bus_lock);
41
42 pci_free_resources(dev);
43 pci_dev_put(dev);
44 }
45
46 /**
47 * pci_remove_device_safe - remove an unused hotplug device
48 * @dev: the device to remove
49 *
50 * Delete the device structure from the device lists and
51 * notify userspace (/sbin/hotplug), but only if the device
52 * in question is not being used by a driver.
53 * Returns 0 on success.
54 */
55 int pci_remove_device_safe(struct pci_dev *dev)
56 {
57 if (pci_dev_driver(dev))
58 return -EBUSY;
59 pci_destroy_dev(dev);
60 return 0;
61 }
62 EXPORT_SYMBOL(pci_remove_device_safe);
63
64 void pci_remove_bus(struct pci_bus *pci_bus)
65 {
66 pci_proc_detach_bus(pci_bus);
67
68 spin_lock(&pci_bus_lock);
69 list_del(&pci_bus->node);
70 spin_unlock(&pci_bus_lock);
71 pci_remove_legacy_files(pci_bus);
72 class_device_remove_file(&pci_bus->class_dev,
73 &class_device_attr_cpuaffinity);
74 sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge");
75 class_device_unregister(&pci_bus->class_dev);
76 }
77 EXPORT_SYMBOL(pci_remove_bus);
78
79 /**
80 * pci_remove_bus_device - remove a PCI device and any children
81 * @dev: the device to remove
82 *
83 * Remove a PCI device from the device lists, informing the drivers
84 * that the device has been removed. We also remove any subordinate
85 * buses and children in a depth-first manner.
86 *
87 * For each device we remove, delete the device structure from the
88 * device lists, remove the /proc entry, and notify userspace
89 * (/sbin/hotplug).
90 */
91 void pci_remove_bus_device(struct pci_dev *dev)
92 {
93 if (dev->subordinate) {
94 struct pci_bus *b = dev->subordinate;
95
96 pci_remove_behind_bridge(dev);
97 pci_remove_bus(b);
98 dev->subordinate = NULL;
99 }
100
101 pci_destroy_dev(dev);
102 }
103
104 /**
105 * pci_remove_behind_bridge - remove all devices behind a PCI bridge
106 * @dev: PCI bridge device
107 *
108 * Remove all devices on the bus, except for the parent bridge.
109 * This also removes any child buses, and any devices they may
110 * contain in a depth-first manner.
111 */
112 void pci_remove_behind_bridge(struct pci_dev *dev)
113 {
114 struct list_head *l, *n;
115
116 if (dev->subordinate) {
117 list_for_each_safe(l, n, &dev->subordinate->devices) {
118 struct pci_dev *dev = pci_dev_b(l);
119
120 pci_remove_bus_device(dev);
121 }
122 }
123 }
124
125 EXPORT_SYMBOL(pci_remove_bus_device);
126 EXPORT_SYMBOL(pci_remove_behind_bridge);
127
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